package simple.runtime.components.impl.android.util;

import android.content.Context;
import android.graphics.Canvas;
import android.util.AttributeSet;
import android.view.MotionEvent;
import android.widget.SeekBar;

public class VerticalSeekBar extends SeekBar {
  
  private SeekBar.OnSeekBarChangeListener mOnSeekBarChangeListener;
  
  public VerticalSeekBar(Context context) {
    super(context);
  }
  
  public VerticalSeekBar(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
  }
  
  public VerticalSeekBar(Context context, AttributeSet attrs) {
    super(context, attrs);
  }
  
  protected void onSizeChanged(int w, int h, int oldw, int oldh) {
    super.onSizeChanged(h, w, oldh, oldw);
  }
  
  protected synchronized void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
    super.onMeasure(heightMeasureSpec, widthMeasureSpec);
    setMeasuredDimension(getMeasuredHeight(), getMeasuredWidth());
  }
  
  protected void onDraw(Canvas c) {
    c.rotate(-90);
    c.translate(-getHeight(), 0);
    onSizeChanged(getWidth(), getHeight(), 0, 0);
    super.onDraw(c);
  }
  
  public boolean onTouchEvent(MotionEvent event) {
    if (!isEnabled()) {
      return false;
    }

    switch (event.getAction()) {
      case MotionEvent.ACTION_DOWN: 
        setPressed(true);
        onStartTrackingTouch();
        break;
      case MotionEvent.ACTION_MOVE: 
        attemptClaimDrag();
        setProgress(getMax() - (int)(getMax() * event.getY() / getHeight()));
        onProgressRefresh();
        break;
      case MotionEvent.ACTION_UP: 
        int i = 0;
        i = getMax() - (int)(getMax() * event.getY() / getHeight());
        setProgress(i);
        onSizeChanged(getWidth(), getHeight(), 0, 0);
        
        onStopTrackingTouch();
        setPressed(false);
        break;
      case MotionEvent.ACTION_CANCEL: 
        onStopTrackingTouch();
        setPressed(false);
    }
    return true;
  }
  
  public void setOnSeekBarChangeListener(SeekBar.OnSeekBarChangeListener l) {
    mOnSeekBarChangeListener = l;
  }
  
  public void onProgressRefresh() {
    if (mOnSeekBarChangeListener != null) {
      mOnSeekBarChangeListener.onProgressChanged(this, getProgress(), true);
    }
  }
  
  public void onStartTrackingTouch() {
    if (mOnSeekBarChangeListener != null) {
      mOnSeekBarChangeListener.onStartTrackingTouch(this);
    }
  }
  
  public void onStopTrackingTouch() {
    if (mOnSeekBarChangeListener != null) {
      mOnSeekBarChangeListener.onStopTrackingTouch(this);
    }
  }
  
  private void attemptClaimDrag() {
    if (getParent() != null) {
      getParent().requestDisallowInterceptTouchEvent(true);
    }
  }
}